Mobile crushing line

Hot selling equipment


Seattle tunnel: Lessons learned from Boston’s Big Dig ...

2019-01-17  Despite delays and cost overruns, transportation and infrastructure experts say Seattle has avoided the problems that plagued Boston’s Big Dig. The next cha...

Get Price

Massive tunneling machine stuck under downtown Seattle ...

2014-05-08  At 57 feet in diameter, it's touted as the world's biggest tunneling machine. It was even given a name, Bertha. But now, after digging just over 1,000 feet, Bertha is broken down and stuck...

Get Price

Seattle tunnel construction avoided costly mistakes of ...

2019-01-17  Seattle used Bertha, the tunnel boring machine, to create the Highway 99 tunnel. Both tunnels were delayed and over-budget, but the numbers are significantly different. The Big Dig

Get Price

Seattle's big tunnel project reaches a milestone, but it's ...

2017-05-01  A project to bore a tunnel under Seattle and construct an underground roadway is $60 million over budget, not $400 million as reported; the conPulverizer is seeking more than

Get Price

Alaskan Way Viaduct Replacement Program WSDOT

The Alaskan Way Viaduct Replacement Program includes 30 projects led by the Washington State Department of Transportation, King County, the City of Seattle and the Port of Seattle. The Federal Highway Administration is a partner in this effort. Major elements of the program include: The SR 99 Tunnel: A two-mile-long tunnel beneath downtown Seattle.

Get Price

Massive tunneling machine stuck under downtown Seattle ...

2014-05-08  Big Dig tunnel project hit by delays, cost increases Dan Springer reports from Seattle, Washington At 57 feet in diameter, it's touted as the world's biggest tunneling machine.

Get Price

Hard grind: The epic journey of the world's biggest tunnel ...

2017-05-01  Called Bertha, the giant digger was tasked with the challenge of building a tunnel large enough to carry four lanes of motor traffic under the heart of Seattle. The story of how it

Get Price

'Big Dig' players among biggest pro-tunnel donors

2006-08-24  The last thing proponents of a Seattle waterfront tunnel want is to be linked to Boston's controversial "Big Dig." But one connection is unavoidable: Companies involved in that infamous project ...

Get Price

MudHoney? Sir Digs-A-Lot? Seattle wants your help in ...

2021-03-27  It’s a big project, but, some perspective: At 21.5 feet, the tunnel-boring machine’s diameter is higher than two basketball hoops, and only about a third of Bertha’s.

Get Price

Boston Big Dig, Central Artery / Tunnel Project ...

The majority of the Big Dig (Central Artery / Tunnel Project) was completed by the middle of 2005 at an estimated cost of $14.625 billion. The Central Artery has been designed and built to accommodate 245,000 vehicles per day. The four-lane Ted Williams Tunnel forms part of the I-90 extension link and was the first major target of the Big Dig to be completed, opening to commercial traffic in ...

Get Price

Seattle confronts prospect of its own long-delayed Big Dig ...

2014-12-30  Seattle confronts prospect of its own long-delayed Big Dig. Northbound Alaskan Way Viaduct traffic backs up at a downtown exit in view of Elliott Bay Monday, Dec. 8, 2014, in Seattle

Get Price

Seattle Tunnel Boring Machine -- Bertha Rescue

2014-12-11  But just more than 1,000 feet into the dig, the machine slowed. Seattle Tunnel Partners, the conPulverizer group running the project, thought they had hit an obstruction and sent divers in through ...

Get Price

The World’s Largest Tunnel-Boring Machine Must Be Saved

2014-09-16  Seattle's tunnel wouldn't be very long—just 1.7 miles of it bored through the earth—but it couldn't be just any tunnel. It needed to be big enough to hold four lanes of traffic across two ...

Get Price

Seattle toasts the tunnel. Lawyers prepare for war Crosscut

2017-04-03  And it would cost $1.4 billion, one piece of a $3 billion effort to replace Highway 99. One of the finalists for the project was Seattle Tunnel Partners, an umbrella company made up of two larger ...

Get Price

The Big Dig: tunnels and bridges Mass.gov

The Ted Williams Tunnel (TWT) beneath Boston Harbor was the first completed milestone of the Central Artery/Tunnel Project. It opened on schedule and within its $1.3 billion budget on December 15, 1995. Named for the Boston Red Sox Legend, the tunnel doubles Boston's cross-harbor tunnel capacity from four

Get Price

MudHoney? Sir Digs-A-Lot? Seattle wants your help in ...

2021-03-27  It’s a big project, but, some perspective: At 21.5 feet, the tunnel-boring machine’s diameter is higher than two basketball hoops, and only about a third of Bertha’s.

Get Price

Public tours site of Seattle's 'big dig'

2012-09-07  Public tours site of Seattle's 'big dig' SCOTT GUTIERREZ, SEATTLEPI.COM STAFF. Sep. 7, 2012 Updated: Sep. 7, 2012 1:19 p.m. Facebook Twitter Email. 21. 1 of 21 Consultant Chris Banbridge speaks to ...

Get Price

The West Coast's Big Dig Boondoggle Woes Continue: Seattle ...

2016-03-22  The Seattle tunnel PLA’s public record of poor performance is already drawing unfortunate comparisons to Boston’s Big Dig, the most infamous PLA boondoggle of all time, which was plagued by delays, accidents, jobsite drinking and cost overruns wasting billions

Get Price

Boston’s Big Dig renders other U.S. cities wary of tunnel ...

2008-03-27  If all had gone as planned, the mayor of Seattle would don a hard hat next year and break ground on a multibillion-dollar project to replace the city’s downtown overpass with a tunnel. But as Seattle debated its project, the Big Dig faced a variety of setbacks: spiralling costs and legal wrangling among conPulverizers, including Bechtel/Parsons Brinckerhoff, and the tunnel accident that killed ...

Get Price

Under Seattle, a Big Object Blocks Bertha. What Is It ...

2013-12-20  Economics and geology — two key threads of Seattle’s creation — underpin the tunnel’s impetus. Planning for the project began after an earthquake in 2001 revealed seismic vulnerability in ...

Get Price

The Big Dig Disaster: Was Design-Build the Answer?

death of Milena Del Valle in one Big Dig tunnel and persistent tunnel leaks also have led many to question the tunnels’ design quality and construction integrity.8 In 1982, when the Big Dig was in its infancy, state construction laws mandated that the Massachusetts Highway Department (MHD) use design-bid-build as the project delivery method.9 In response to years of criticism regarding state ...

Get Price

9 U.S. highway tunnel projects: Insights into what we ...

2017-04-26  Traffic enters the Thomas P. O'Neill Jr. Tunnel, the major component of the Big Dig on Dec. 8, 2007, in Boston. The Big Dig, the nation's most complex and costliest highway project, was completed ...

Get Price

Seattle toasts the tunnel. Lawyers prepare for war Crosscut

2017-04-03  And it would cost $1.4 billion, one piece of a $3 billion effort to replace Highway 99. One of the finalists for the project was Seattle Tunnel Partners, an umbrella company made up of two larger ...

Get Price

Bertha: Off the hook in the Legislature but not out of ...

2015-01-27  The “big dig” intersects with the state’s next big election. When Bertha arrived in the summer of 2013, the two-mile tunnel was expected to be completed and operating by late in 2015.

Get Price